Portable storage device



FIG. 1 is an elevated, perspective view of the portable storage device in accordance with my invention;

FIG. 2 is a side view thereof;

FIG. 3 is an opposite side view of FIG. 2;

FIG. 4 is another side view of the invention as shown in FIG. 1;

FIG. 5 is an opposite side view of FIG. 4;

FIG. 6 is a top view of the invention; and,

FIG. 7 is a bottom view of the invention.

The broken lines showing a phone are for the purposes of illustrating environment and form no part of the claimed design. 

CLAIM The ornamental design for the portable storage device, as shown and described herein. 